2026-04-06 7 min read
If you've ever heard a loud bang from your garage. like a gunshot going off inside. there's a good chance a spring just let go. It's one of the most startling things that can happen in a home, and it happens to Novato homeowners more often than most people realize. Springs are the muscle behind every garage door cycle, and they have a finite lifespan. Understanding what they do, when they fail, and what it costs to replace them is genuinely useful information to have before you're stuck with a door that won't move.
Most residential garage doors use one of two spring types: torsion springs (mounted horizontally above the door opening) or extension springs (running along the sides of the tracks). Torsion springs work by twisting under tension to counterbalance the door's weight, while extension springs stretch and release. Both types do the same fundamental job. they make a 150,200+ pound door feel light enough for a motor or your own arm to lift.
The catch is that springs are rated by cycles. One cycle equals one full open-and-close. Standard torsion springs typically last 10,000 to 20,000 cycles, which translates to roughly 7,15 years for most households. Extension springs tend to have a shorter lifespan, usually 7,12 years. If your family uses the garage as the main entry point. which is common in Novato neighborhoods like Hamilton and Ignacio. your door might complete 5 or more cycles per day, burning through that lifespan faster than you'd expect.
Novato's climate plays a real role here. The city sees average annual humidity around 75%, with January humidity levels hitting 80%. and bay-adjacent areas like Bel Marin Keys and Black Point deal with even more moisture exposure from the nearby tidal wetlands. That persistent dampness accelerates rust and metal fatigue on spring coils. Without regular lubrication, springs in this environment can fail well before their rated cycle count.
Then there's the housing stock itself. Downtown Novato and the older sections near Ignacio contain significant homes from the 1950s through 1970s. many of which still have original or early-replacement hardware. Springs in these systems have often been in service for decades and may predate modern safety standards entirely. On the other end of the spectrum, Hamilton's newer planned community features larger two- and three-car garages with heavier doors that demand springs with higher torque ratings. When the spring is mismatched to the door weight, wear accelerates fast.
If you're not sure what shape your springs are in, our garage door maintenance checklist has a simple inspection section that can help you identify early warning signs.
Don't wait for the loud bang. Watch for these indicators:
- The door feels unusually heavy when you try to lift it manually. disconnect the opener and try to raise the door by hand. It should lift smoothly and stay put at about waist height. - The door moves unevenly, dipping or rising faster on one side than the other. - Visible gaps or separation in the spring coil. a broken torsion spring often shows a clear gap where it snapped. - Scraping or squealing sounds during operation, especially if they've developed recently. - The opener strains or reverses without the door making it all the way up. the motor is working against a door that's lost its counterbalance.
If you spot any of these, learn more about what professional inspection covers before things get worse.
For most Novato homeowners, spring replacement runs between $250 and $540 for a professional job, depending on spring type, door size, and whether cables need attention at the same time. Torsion springs cost more than extension springs but last significantly longer and are generally the safer choice. Extension springs, if they fail while extended, can release violently. torsion springs stay contained on the torsion bar when they break.
Here's a practical cost breakdown:
- Single extension spring: $50,$100 per spring including labor - Torsion spring replacement: $150,$350 for the job - Both springs on a double-wide door: $300,$540 total - Spring + cable replacement combo: $200,$500
One thing worth knowing: when one spring breaks, the other is usually close behind. Both springs have the same usage history, so replacing them together during the same visit makes economic sense. you avoid a second service call and keep the door balanced.
For the larger two- and three-car garages common in Hamilton, heavier-duty springs will push costs toward the higher end of those ranges. That's normal and worth it. undersized springs on a heavy door will fail faster and put extra strain on your opener motor.
We'll be direct about this: garage door spring replacement is one of the more dangerous home repairs you can attempt. Torsion springs remain under tremendous pressure even when the door is closed. Without the proper winding bars and technique, releasing or winding that tension incorrectly can cause the spring to snap loose with enough force to cause serious injury. This isn't a liability disclaimer. it's physics. Professional technicians have both the tools and the training to do this safely in 30 minutes to an hour.
Garage Door Novato handles spring replacements with proper sizing for your specific door weight, so you're not just getting a spring. you're getting a spring that's correctly matched to your system.
If you're ready to schedule an inspection or replacement, contact our team and we can usually get out to you the same day.
A little maintenance goes a long way. A few practical habits:
- Lubricate your springs twice a year with a silicone-based or lithium grease spray. never WD-40, which actually strips lubrication over time. Given Novato's year-round humidity, this matters more here than in drier climates. - Test your door balance by pulling the emergency release cord and lifting the door manually. If it doesn't stay up on its own, something's off. - Don't ignore cable wear. frayed or loose cables create uneven tension that strains springs faster.
Q: Can I use my garage door if one spring is broken? Technically the door may still move, but you shouldn't use it. A broken spring throws the door off balance and puts enormous strain on the opener motor and cables. Continuing to operate it risks damaging the opener and creating a genuine safety hazard. the door can drop suddenly on one side.
Q: How do I know if I have torsion or extension springs? Torsion springs are the coiled springs mounted horizontally on a metal rod directly above the door opening. Extension springs run along the horizontal tracks on either side of the door. If you're unsure, a quick look when the door is closed will usually make it obvious. or just ask when you call for service.
Q: Is it worth upgrading to high-cycle springs when I replace them? For most Novato homeowners, yes. especially if your garage is your primary entry point. High-cycle torsion springs rated for 20,000+ cycles cost more upfront but can double the time before your next replacement. Given the humidity in Marin County, pairing higher-cycle springs with regular lubrication is the most cost-effective long-term strategy.